High strength, heavy duty hexagonal construction screws with diameters from 1/2" to 1-1/2" are covered by the ASTM A325 standard. Because these bolts are intended for use in structural connections, the thread length is shorter than regular hexagonal bolts. For thread lengths and other relevant dimensions, please see the structural bolts page on our website. ...
Roll Fast is a leading fastener and component supplier to manufacturers for the construction of Railways. A rail fastening system is used for fastening the steel rail and railway sleeper. Railway fasteners are crucial components in the construction and maintenance of railway tracks, serving as the connective elements that secure rails to the railway ties (or...
The ASTM A320 specification covers alloy steel and stainless steel bolting materials for low temperature service. This standard covers rolled, forged, or strain hardened bars, bolts, screws, studs, and stud bolts used for pressure vessels, valves, flanges, and fittings. Like the ASTM A193 specification , unless otherwise specified, the 8UN thread series is s...
Roll-fast is a leading manufacturer and supplier of different stainless steel fasteners. Our Stainless Steel Fasteners division specializes in the distribution of Austenitic grade fasteners. Stainless steel fasteners are particularly popular in the automotive industry, Aerospace industry which involves stainless steel screws in the construction of structural...
A nut is a type of fastener with a threaded hole. Nuts are almost always used in conjunction with a mating bolt to fasten multiple parts together. Heavy hex nuts are slightly larger and thicker than standard (finished) hex nuts. There are numerous grades and the heavy pattern is typically used for large-diameter and high-strength bolts. See our nut compatibi...
Spring washers, which have axial inflexibility and are used to help fastening or loosening due to climate. Locking washers, which help fastening or loosening by precluding coiling gyration of the fastening device; locking washers are generally also spring washers. In proposition split washers( aka lock washers or spiral spring washers) are supposed to work b...
Spring washers, which have axial inflexibility and are used to help fastening or loosening due to climate. Locking washers, which help fastening or loosening by precluding coiling gyration of the fastening device; locking washers are generally also spring washers. In proposition split washers( aka lock washers or spiral spring washers) are supposed to work b...
Roll Fast is a leading manufacturer, exporter, and supplier of washer head bolts in India. The forged washer side provides a larger bearing surface so that when the bolt is tightened, the wood underneath the head is not damaged. These bolts are used when the head of the bolt sits flush with a wooden member. Washer head bolts have an added semi-cone point and...
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Roll Fast manufactures and supplies custom bolts to various industries. custom bolts represent a significant advancement in fastening technology, offering tailored solutions that enhance the functionality and longevity of products across a broad spectrum of industries. We have a wide range of customized products. We also provide custom bolts for the telecomm...
Roll-Fast is a manufacturer of Stud bolts for Ship Engines & Automotives from M10 to M100 or 1/2” to 4” diameters. The all-thread stud bolt is a threaded rod with 2 heavy hex nuts, while the tap end and double end are nut continuously threaded, but have a body in the middle with one nut. The Stud Bolts provide the ability to obtain much more accurate tor...
